Swivel-coupling



A. V. AND J. S. GULLBORG. SWIVEL COUPLING. APPLICATION'FILED APR. 21, 1919.

Patented Jan. 25, 1921.

UNITED STATES PATENT OFFICE.

ARTHUR V. GULLBORG AND JOHN S. GULLBORG, OF CHICAGO, ILLINOIS, ASSIGNORS,

BY MESNE ASSIGNMENTS, TO THE BASSICK MANUFACTURING COMPANY, A COR- PORATION OF DELAWARE.

swrvk-cournme.

Specification of Letters latent.

Patented Jan. 25, 1921.

Application filed April 21, 1919. Serial No. 291,607.

county of Cook and State of Illinois, have invented certain new and useful Improvements in Swivel-Couplings, (Case 1,) of which the following is a full, clear, concise,

and exact descriptiomreference being bad to the accompanying drawings, forming a part of this specification.

Our'invention relates'to swivel couplings and is.especially concerned with the provision of a swivel coupling to be used in con-.

nection with lubricating apparatus such as that disclosed in the co-pending applications of Arthur V. Gullborg, Serial Nos. 216,586 and 267,858, filed respectively on February 11, 1918 and December 21, 1918. The objects )f'our invention are: First: to provide a coupling which will I facilitate the connection of the discharge conduit of the grease gunwith the coupling member which is permanently secured to the bearing vided with our improved swivel coupling shown connected with a coupling member adapted to be secured to a bearing;

Fig. 2 is a side elevation on an enlarged scale, of. our improved coupling member, showing it attached to a coupling member adapted to be secured to a bearing to be lubricated; and

Fig. 3 is a central longitudinal section through Fig. 2, taken substantially on the plane of the drawing.

In the .several views similar reference characters will be used to refer to similar parts.

In the above mentioned. applications of Arthur V. Gullborg, certain lubricating apparatus is disclosed which comprises a a tubular member 8' having one end grease gun having a flexible conduit ending 1n a coupllng member, which is adapted to be secured to other coupling members that are permanently attached to the bearings to be lubricated. In these applications the one coupllng member is rigidly secured to the dlscharge conduit, and both members are provided with coacting means forming a bayonet coupling by means of which the two coupling members may be secured together. In order to secure the coupling member on the end of the discharge conduit to the coupling member which is attached to the hearing, it is necessary either to turn the entire grease gun and its flexible discharge conduit or to turn the coupling member secured to the discharge conduit against the torsion of the flexible conduit. One of the purposes of our present invention is to provide means which will permit of this connection between the two coupling members more easily and expeditiously.

Referring to the drawings the reference character 5 indicates the barrel or cylinder of a greasegun, which is provided with a plunger (not shown) having a screwthreaded piston rod 6. The grease gun is provided with a flexible discharge conduit 7, which is preferably made of braided metal or other similar material which will withstand comparatively high pressures. Our improved swivel coupling comprises enlarged as shown at 9, and provided with a bearing for receiving the free end of the discharge conduit 7. Preferably the end of the conduit 7 is soldered or otherwise secured to the enlarged end 9. A plug 10, is rotatably mounted upon the tubular member 8, and one end thereof bears against the enlarged portion 9 of the tubular member. The plug 10 is provided with facets 11 adjacent the last mentioned end to receive the jaws of a wrench or other tool, by means of which it canbe rotated. The other end of the plug 10 is screw-threaded as shown at is adapted to rest when the sleeve 17 is detached from the coupling member 21. The cup leather 20 is urged against the shoulder 19 by means of a spiral spring 22, one end of which rests against the washer 14 and iscentered by the swaged over end 16 of the tube 8. The other end of the spring 22 rests against 'a washer 23 in the cup leather.

The coupling member 21, with which the improved swivel coupling of our invention is designed to co-act, and which is described in the first mentioned application of the ends of the coupling member is Arthur V. Gullborg,

threaded at 25 to provide means for connecting-it with a bearing, and the other end swaged over as shown at 26, to provide a seat for the ball closure 27. A pin 28 extends through the sides of the tubular member and from both sides thereof, and coacts with bayonet slots 29 formed in the sleeve 17 A flange 30 formed intermediate provided with facets 31 for co-acting with the jaws of a wrench. This flange is spaced sufliciently from the end of the tubular member 24, which is flanged over to permit this end to raise the cupleather 20 from its seat when the two coupling members 17 and 21 are brought into co-acting relation so as to provide an eflicient seal between the cup leather and'the flanged over end of the coupling member 21. A spring 32, confined between the pin 28 and the closures 27 provides means for yieldingly retaining the closure 27 in its closed position.

It is believed that the operation of our improved coupling will be clear from the above description. When it is desired to connect our coupling member with a coupling member 21, it is merely necessary to bring the sleeve 17 into registering position with the flanged over end of the coupling member 21, whereupon the sleeve 17 can be pushed over the end of the coupling member 21, and the in 28 and slot 29 brought into coacting r ation by giving the sleeve 17 a slight rotary movement. At the same time the 7 cup leather 20 is raised from its seat formed by the shoulder 19 and forms a seal between the sleeve 17 and the coupling member 21. It will be noted that one side of the slot 29 is recemed, as shown at 35, to receive the pin 28, so that the two coupling members cannot be uncoupled except after an initial movement of the sleeve 17. toward the flange 30 against the tension of the spring 22.

While we have described the details of the preferred embodiment of our invention,

it is to be clearly understood that it is casupra, comp 'ses a tubular member 24 having one e d screw-" with ashoulder, acup said shoulder with its flange extending to- 85 ed on said tubular member and having one end abutting against said enlarged end, a

gasket resting against the other end of said plug, a washer on said tubular member for securing said gasket in place, the end of said tubular member being swaged over to hold said washer against-said gasket, a sleeve having one end screw-threaded onto said plug, the bore of said sleeve being provided leather resting against ward said plug, and a spiral spring between said cup leather and said washer, for holding said cup leather against said shoulder, the end of said spring adjacent said washer being centered said tube.

2. A swivel coupling comprising a tubu lar member, a screwthreaded plug rotatably mounted on said tubular member, a gasket resting against one end of said plug, a

sleeve having one end screwthreaded onto said plug, the bore of said sleeve being provided with a shoulder, a cup leather resting against said shoulder and projecting into the bore of said sleeve, for holding said cup leather against said shoulder.

3. A swivel coupling comprising a tubu lar member, a plug rotatably mounted on said tubular member, end secured to said plug, a single gasket for sealing the joint between said tubular member and said plug and the joint between said plug and said sleeve, a cup leather slidably mounted in said sleeve and projecting into the bore of said sleeve for makin com tact with a tubular member inserted" in the other end of said sleeve, and a springconfined between said plug and said cup leather for urging said cupleather toward the end of said sleeve opposite said plug.

4. A' swivel coupling comprising a tubular member, a sleeve rotatably mounted on said tubular member, means for sealing the connection between said tubular member and said sleeve, a cup leatherin said sleeve, the side of the cup leather adjacent said tubular member being subjected to the 'pressure of the fluid in said sleeve and a ,sprin for urging said cup leather away from sai tubular member.

5. A coupling comprising two members, one of which fits within the other, means for establishinga quick detachable connection between said members, a perforated gasket by the swaged over end of 90 and a. spiral spring 100 a sleeve having one 105 onto one of said members and a g slidable in one of said members, means for holding said gasket in contact with the other of said members, a tubular member swiveled asket interposed between said last named member and said tubular member.

6. A coupling comprising two members,

one of which fits within the other, means for detachably connecting said members together and holding them against rotation, a

a gasket slidably mounted in one of the said members and contacting with-the other of said members, and means for rotatably connecting the end of a conduit withsaid mem:

her in which said gasket is slidably mounted, whereby said conduit can be rotated relatively to said last named memberwithout moving said last named member relatively to said gasket,

- In witness whereof, we hereunto subscribe our names "this 16 day of A Iil, 1919.

ARTHUR V. ULLBORG. JOHN S. GULLBORG.

1 Witnesses: I

JOHN L. STEFFEN,

GEO; P. ADAMS. 

